I have successfully set up multiple "bots" on mobile using an android app called "ClickTouch Automatic Clicker"
I have used this auto clicker to set up power mining bots, fletching, woodcutting, herblore, high alch, and many more. The strategy is to setup a multi-location clicker with each click having a different interval with randomization for both the pixel location and the interval. For instance, I have a power mining "bot" that will mine 3 iron ore and drop in-between the mining. It is set up to click mine every 2300 milliseconds and randomize that click +/- every 500 milliseconds.
To the next question I know some would ask... yes I have set this up to auto-bank as well for various tasks. Stringing bows, cleaning herbs, fletching and more. I've even successfully set up a bot that will cut trees, fletch them into bows and then drop them (or arrow shafts so they stack).
Best of luck.